mirror of
https://codeberg.org/ziglang/zig.git
synced 2025-12-09 15:19:07 +00:00
59 lines
No EOL
1.9 KiB
C
Vendored
59 lines
No EOL
1.9 KiB
C
Vendored
/* $OpenBSD: refcnt.h,v 1.16 2025/08/05 12:52:20 bluhm Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 2015 David Gwynne <dlg@openbsd.org>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#ifndef _SYS_REFCNT_H_
|
|
#define _SYS_REFCNT_H_
|
|
|
|
/*
|
|
* Locks used to protect struct members in this file:
|
|
* I immutable after creation
|
|
* a atomic operations
|
|
*/
|
|
|
|
struct refcnt {
|
|
unsigned int r_refs; /* [a] reference counter */
|
|
int r_traceidx; /* [I] index for dt(4) tracing */
|
|
};
|
|
|
|
#define REFCNT_INITIALIZER() { .r_refs = 1, .r_traceidx = 0 }
|
|
|
|
#ifdef _KERNEL
|
|
|
|
void refcnt_init(struct refcnt *);
|
|
void refcnt_init_trace(struct refcnt *, int);
|
|
void refcnt_take(struct refcnt *);
|
|
int refcnt_rele(struct refcnt *);
|
|
void refcnt_rele_wake(struct refcnt *);
|
|
void refcnt_finalize(struct refcnt *, const char *);
|
|
unsigned int refcnt_read(const struct refcnt *);
|
|
|
|
#define refcnt_shared(_r) (refcnt_read((_r)) > 1)
|
|
|
|
/* sorted alphabetically, keep in sync with dev/dt/dt_prov_static.c */
|
|
#define DT_REFCNT_IDX_ETHMULTI 1
|
|
#define DT_REFCNT_IDX_IFADDR 2
|
|
#define DT_REFCNT_IDX_IFMADDR 3
|
|
#define DT_REFCNT_IDX_INPCB 4
|
|
#define DT_REFCNT_IDX_RTENTRY 5
|
|
#define DT_REFCNT_IDX_SOCKET 6
|
|
#define DT_REFCNT_IDX_SYNCACHE 7
|
|
#define DT_REFCNT_IDX_TDB 8
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* _SYS_REFCNT_H_ */ |